Uropi is an International Auxiliary language created by Joel Landais. It is a synthesis of all the common points that can be found in Indo-European languages. Its main characteristics are simplicity, internationality and transparency

Slavic languages, i.e Russsian, Ukrainian, Bielorussian, Polish, Bulgarian, Cezch, Slovak, Serbian, Croatian, Slovene, etc... are Indo- European languages, and thus, they have many common points with Uropi. In Uropi, there are many words of Slavic origin, although they are not so numerous as those coming from Latin and Germanic languages.

Here are a few statistics made on a list of 700 every words: 37,32 % of the Russian terms and 38 % of Serbo-Croatian terms are related to Uropi words, as against 61,86 of the Italian terms and 56 % of the French, German and Dutch terms.

Those "Slavic" words may come from common Indo-European roots, the Slavic form of which has been taken on by Uropi words.

But above all, the most striking similarity between Uropi and Slavic languages is the building of compound verbs. These verbs, which often have a more abstract and elaborate meaning, are formed by adding a prefix with a precise meaning to simple verbs. Here are the main prefixes: